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arXiv 1202.1652hep-phnucl-th
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弱B荷衰变为三荷π介子的CP破坏和强π-π相互作用

CP violation and strong pion-pion interactions in the weak B charged decays into three charged pions

B. Loiseau, J. -P. Dedonder, A. Furman, R. Kaminski, L. Lesniak

摘要:

在QCD分解框架下,分析了一个带电π介子加两个带电π介子的S、P或D态的准两体衰变过程中的带电B衰变数据。短距离振幅的计算包括下一个到领先的顺序修正的强耦合常数的顶点和企鹅的贡献。两个带电π介子末态相互作用产生的长距离振幅分别用π介子非奇异标量和矢量形状因子描述两个π介子S波和P波态,用相对论Breit-Wigner公式描述D波态.我们实现了一个很好的拟合的数据,只有三个参数的S波,一个P波和一个D波。我们的模型用π标量形状因子统一描述了三个标量共振f_0(600)、f_0(980)和f_0(1400)。我们预测B到f_2(1270)跃迁的形状因子在动量转移平方等于π介子质量平方时的值为0.098+-0.007。

英文摘要:

An analysis of charged B decay data in a quasi two-body decay into a charged pion plus a S, P,or D state of two charged pions is performed in the QCD factorization framework. The short distance amplitudes are calculated including next-to-leading order corrections in the strong coupling constant for vertex and penguin contributions. The long distance amplitudes due to the two charged pion final state interactions are described by the pion non-strange scalar and vector form factors for the two-pion S- and P-wave states, respectively and by a relativistic Breit-Wigner formula for the D-wave state. We achieve a good fit of the data with only three parameters for the S wave, one for the P wave and one for the D wave. Our model gives a unified unitary description of the three scalar resonances, f_0(600), f_0(980) and f_0(1400) in terms of the pion scalar form factor. We predict for the B to f_2(1270) transition form factor a value of 0.098+-0.007 at a momentum transfer square equal to the pion-mass square.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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